menu_driver man page on Ultrix

menu_driver man page on Ultrix

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menu_driver(3X)						       menu_driver(3X)

NAME
       menu_driver - command-processing loop of the menu system

SYNOPSIS
       #include <menu.h>
       int menu_driver(MENU *menu, int c);

DESCRIPTION
       Once a menu has been posted (displayed), you should funnel input events
       to it through menu_driver.  This routine has  two  major	 input	cases;
       either the input is a menu navigation request or it's a printable ASCII
       character.  The menu driver requests are as follows:

       REQ_LEFT_ITEM
	    Move left to an item.

       REQ_RIGHT_ITEM
	    Move right to an item.

       REQ_UP_ITEM
	    Move up to an item.

       REQ_DOWN_ITEM
	    Move down to an item.

       REQ_SCR_ULINE
	    Scroll up a line.

       REQ_SCR_DLINE
	    Scroll down a line.

       REQ_SCR_DPAGE
	    Scroll down a page.

       REQ_SCR_UPAGE
	    Scroll up a page.

       REQ_FIRST_ITEM
	    Move to the first item.

       REQ_LAST_ITEM
	    Move to the last item.

       REQ_NEXT_ITEM
	    Move to the next item.

       REQ_PREV_ITEM
	    Move to the previous item.

       REQ_TOGGLE_ITEM
	    Select/deselect an item.

       REQ_CLEAR_PATTERN
	    Clear the menu pattern buffer.

       REQ_BACK_PATTERN
	    Delete the previous character from the pattern buffer.

       REQ_NEXT_MATCH
	    Move to the next item matching the pattern match.

       REQ_PREV_MATCH
	    Move to the previous item matching the pattern match.

       If the second argument is a printable ASCII character, the code appends
       it to the pattern buffer and attempts to move to the next item matching
       the new pattern.	 If  there  is	no  such  match,  menu_driver  returns
       E_NO_MATCH and deletes the appended character from the buffer.

       If  the	second	argument is one of the above pre-defined requests, the
       corresponding action is performed.

       If the second argument is neither printable ASCII nor one of the	 above
       pre-defined  menu requests, the drive assumes it is an application-spe‐
       cific command and returns E_UNKNOWN_COMMAND.  Application-defined  com‐
       mands  should  be defined relative to MAX_COMMAND, the maximum value of
       these pre-defined requests.

RETURN VALUE
       menu_driver return one of the following error codes:

       E_OK The routine succeeded.

       E_SYSTEM_ERROR
	    System error occurred (see errno).

       E_BAD_ARGUMENT
	    Routine detected an incorrect or out-of-range argument.

       E_BAD_STATE
	    Routine was called from an initialization or termination function.

       E_NOT_POSTED
	    The menu has not been posted.

       E_UNKNOWN_COMMAND
	    The menu driver code saw an unknown request code.

       E_NO_MATCH
	    Character failed to match.

       E_REQUEST_DENIED
	    The menu driver could not process the request.

SEE ALSO
       curses(3X), menu(3X).

NOTES
       The header  file	 <menu.h>  automatically  includes  the	 header	 files
       <curses.h>.

PORTABILITY
       These  routines	emulate the System V menu library.  They were not sup‐
       ported on Version 7 or BSD versions.

AUTHORS
       Juergen Pfeifer.	 Manual pages and adaptation for new curses by Eric S.
       Raymond.

							       menu_driver(3X)

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